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TypeScript schema validation libraries

Zod is the default and that's not changing in 2026 — but the runners-up have real reasons to exist. Valibot for bundle-conscious shops (5-10× smaller), ArkType for the type-system maximalists, TypeBox for JSON Schema interop, Yup and Joi as the legacy options. Pick on bundle size + how much TypeScript you want bleeding into your schemas.

  1. 1
    colinhacks/zod
    not yet analysed — run analysis →
  2. 2
    fabian-hiller/valibot
    not yet analysed — run analysis →
  3. 3
    arktypeio/arktype
    not yet analysed — run analysis →
  4. 4
    sinclairzx81/typebox
    not yet analysed — run analysis →
  5. 5
    jquense/yup
    not yet analysed — run analysis →
  6. 6
    hapijs/joi
    not yet analysed — run analysis →

Editorial picks. Roster is hand-curated; verdict signals come from RepoPilot's most-recent analysis of each repo. Informational only — not professional, security, or legal advice.